Red Hat Bugzilla – Bug 80624
GID != UID
Last modified: 2007-11-30 17:10:31 EST
Description of problem:
Private gids aren't the same as uids, even when that would be possible.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Start redhat-config-users and add a user
2. Check create private group and specify user id manually.
3. Select a higher uid than the existing ones
The gid for the new user's private group will be the next free gid.
On a fresh system it will be 500.
I expected the gid of the new user's private group to be the same
as the uid, as it's convenient to have uid = gid for private groups.
nalin, is there a way that libuser could tell us what the lowest unallocated uid
and gid is?
Changing component to libuser since it is what decides what UID to allocate to a
new user and group.
The lowest unallocated uid/gid is available as
When creating an user, s-c-users currently:
* creates an user entity
This also calls lu_user_default (), filling the entity with
a default (first unallocated) UID and GID and interpreting the
config file, which by default sets GID == UID [without checking
whether the GID already exists and without making sure the
group gets created, but that's another story]
* modifies the user entity, including setting the UID manually,
* if a private group is desired:
- creates a group entity
This calls lu_group_default(), filling a default GID
- sets user->GID = group->GID
- creates the group
* creates the user
I can't see any reasonable place where libuser would cause the GID
to be equal to UID.
s-c-users, OTOH, has the following possibilities:
* check whether "UID" is a free GID value, and set it in the
group entity manually if it is free
* use the GID from user entity, check whether it is a free GID value,
and set it in the group entity if it is free
(this depends on the default libuser config which specifies
userdefaults/LU_GIDNUMBER = %u).
system-config-users-1.2.19-1 should have a fix for this.